Ira dimock



I. DIMOCK.

Egg Boiler. y

Patented Oct. 20, 1868.

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DIMOCK. OF FLORENCE, MASSACHUSETTS.

Letters Patent No. 83,264, dated October 20, 1868.

APPARATUS FOR BOILING- EGGS.

-The Schedule referred to in these Letters Patent and making part ofthev same.

To all/whom 'it ma/y concern:

Beit known thatl I, IRA DIMOCK, of Florence, in the county of Hampshire,and 'State of Massachusetts, have invented a new and improved Apparatusfor Boiling Eggs; and I do hereby declare that the following is a full,clear, and exact description thereof,

which will enable those skilled in the art to make and use the same,reference being had to the accompanying drawings, forming part 'of thisspecification, in which- Figure 1 is a sectional elevation of myinvention.

Figure 2 is a detail top view` of the adjusting-boss,

. temperature has been arrived at.

My invention consists in placing a fluid which will expand by heat, in acase, and in surrounding such case by another case,so as to leave anair-cavity, or with some substance which is a slow conductor of heat.

The quantity of liquid in the oase, the extent of the cavity for air, orthe thickness of the slow heat-conducting substance, isso proportionedthat when used,

say, for boiling eggs, the liquid within the instrument will haveattained a given degree of expansion by the time the eggs are properlycooked, and this will be the case whether the eggs are placed in cold orboiling water.

My invention also consists in showing the degree of expansion in theiuid, within the case above referred to, -by causing it to act upon apiston in a cylinder, or actv upon a diaphragm, which piston ordiaphragm is made to transmit the motion to a latch or catch, whichholds a hammer, and allows it to strike a bell, and thus announce bysound that the proper degree of heat has been arrived at.

Though a liquid has been mentioned as the medium through which h'eat istransmitted to the eggs to be cooked, yet tle`apparatus will act whenthe eggs are exposed to the action ot' iteam, or a hot bath of sand orother suitable substance.

The manner in which my invention is carried into 'effect is illustratedin the accompanying drawlngs.

In the drawings, my apparatus is shown to consist of a receptacle forholding the eggs, (which receptacle may be a rack, basket, orframe-work, of wire or other suitable metal, ormateiial capable ofundergoing heat without destruction,) combined with and forming part ofa vthermo-annunciator, the construction and operation of 'which will nowbe particularly set forth.

The thermo-annuneiator consists of an inner cylindrical case, b, closedat its lower end, and resting upon another case, c, (as shown,) of'larger diameter, so as to leave a space for air.

The upper end of the cylindrical case b is closed by an India-rubberdiaphragm., b3, and this is secured by a cap, c, which screws upon theouter case, c, and also secures the ilange of a vertical tube, c2.

Within this tube a plug or piston, d1, is tted, which can slide freelyup anddown in the tube c2, but is prevented from turning round by a pin,g, xed in the side of the tube c2, and passing into a slot in the plugor piston cl.

The lower end of a spindle, d, is made to screw into the plug or pistond1, and the upper end of this spindle slides through a bush, h; ixed inthe.tube c2, and around the spindle d a helical spring, lc, is placed,one end of which acts against the bush h, and the other end against theplug or piston all.

To the upper end of the spindle d, a boss, d2, is secured, which isrecessed upon its under side, so that it may form a catch all round, forthe hook f2, of the hammer e, to take hold of, this hammer being placedon a fulcrum, f in a slot in the bush h, which comes .f opposite a slotin the side of the tube c?.

upwards until the incline-surfaces can pass, when the' weight of thespindle d and other attached parts, and the force of the spring k, willcause the spindle d to descend, so as to hold the hammer e in theposition shown by iig. l.

A cap, l, forming a screw-head, is also attached to the upper end of thespindle d, by a screw, Z. This is milled upon the edge, so that it canbe turned whenrequired, and the index-marks are placed upon the upperface, as shown in lig.. 2; and there is a pointer, eX, upon thehammer-lever, by which to set the index.

There are vertical grooves in the side of the bosspart l, one for eachmark upon the index; and a screw, l2, is passed through the side of thetube o2, the point of which will enter one of the slots.

By pulling the head, Z, upwards until the end of the screw Il comes`opposite a groove, la, passing round the boss, the head, Z, can beturned, as required, until the' point of the screw comes opposite thegroove correspending to the mark upon the index to which the instrumentis to be set.

rlhe index is secured, when adjusted, by a pin in the head, l, whichpasses into a hole in the boss d2.

The bell el is fixed upon the exterior of the tube c2, as shown.

When the iiuid within the case b has become heated suiiciently to causeit to expand, the diaphragm, in yielding, permits such expansion to befelt by the spindle d, raising it, and thus liberating the hammer e,Whichlatter descends and strikes upon the bell e', thus announcing thatthe proper degree of heat has acted upon the eggs. V

Modifications of my invention may be made, as, for

example, those shown and described in a patent granted to me in England,September 30, 1867, (N o. 2,750,) in all of Which are employedthenon-conducting cases, which retard the penetration of. heat, so that asuicient time for cooking the eggs will elapse before the iuid withinthe inner case Will be made to expand, and thus announce the fact, byactuating a piston or diaphragm, and its accessory mechanism, or byraising the saiduid to a certain height on a scale.

I desire to be understood as not limiting myself to the precisearrangement or construction of the parts of the bell-hammer and itscatch-mechanism, for the same may be variously modified Withoutdeparting, from the general features of my invention.

I claim as new, and desire to secure by Letters Patentl. The use, in anapparatus for boiling eggs, of a iiuid, surrounded by a slowheat-conducting material or air-cavity, substantially as described, incombinar tion with a bell or other sonorons annunciator, thestriking-hammer of which is actuated to strike the same, from theexpansion ofthe said iiuid, all as set forth.

2. The use of a iluid in a case arranged to act, by expansion, on apiston or diaphragm, Whichfwill transall substantially as shown anddescribed, and for the purpose set forth. Y

3. `An egg-boiling apparatus, when constructed substantially as hereinshown and described.

4. The combination, in an egg-boiling apparatus, of an egg-receptacle,al, of any suitable form, witha case, b, enclosed by another case, c, toretard the penetration of heat to Aa uid Within the inner case,substantially as described.

IRA DIMO CK.

Witnesses:

A. B. CLARK, SAMUEL PORTER.

mit movement, so as to release a catch and' ring a bell

